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Studies on the hymenopterous parasitoids of Liriomyza trifolii (Burgess) (Dipt., Agromyzidae) on broad beans in Egypt
Author(s) -
Shahein A.,
ElMaghraby M. M. A.
Publication year - 1988
Publication title -
journal of applied entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.795
H-Index - 60
eISSN - 1439-0418
pISSN - 0931-2048
DOI - 10.1111/j.1439-0418.1988.tb00606.x
Subject(s) - eulophidae , agromyzidae , braconidae , biology , pteromalidae , infestation , botany , horticulture , parasitoid , biological pest control , pest analysis
The relationship between infestation of Liriomyza trifolii (Burgess) and their parasitoids in the field of broad beans in Zagazig region, Egypt was studied. The distribution density of L. trifolii mines corresponded sharply with the level of the same plant. Generally there were no or little mines on the upper level, while the middle and lower one were highly infested and reached its maximum at the late season of plantation. The percentage of parasitoids began with a low value and reached also its maximum by 3rd and 5th collection. Both, Diglyphus sp. (Hym., Eulophidae) and Opius sp. (Hym., Braconidae) were the dominate species and more effective against L. trifolii than the other three parasitoids namely Hemiptarsenus sp. (Hym., Eulophidae), Halticoptera sp. (Hym., Pteromalidae) and Achrysocharella sp. (Hym., Eulophidae) which appeard generally with neglegted percentages. The percentage of the parasitoids occurrence was enough to keep the population size of L. trifolii beyond the econmomic level. Zusammenfassung Über die Hymenopteren‐Parasitoiden von Liriomyza trifolii (Burgess) (Dipt., Agromyzidae) an Breitbohnen in Ägypten Es wurden die Beziehungen zwischen Liriomyza trifolii und ihren Parasitoiden an Breitbohnen im Freiland in der Region Zagazig, Ägypten, untersucht. Die Dichte von L. trifolii ‐Minen hing deutlich von der Blattfläche an der Pflanze ab. Im allgemeinen waren die oberen Blätter nicht befallen. Die Parasitierungsquote begann mit niedrigen Werten und erreichte zur 3. und 5. Aufsammlung ihr Maximum. Diglyphus sp. (Hym., Eulophidae) und Opius sp. (Hym., Braconidae) waren die zwei effektivsten Gegenspieler von L. trifolii im Vergleich zu drei weiteren Parasitoiden: Hemiptarsenus sp. (Hym., Eulophidae), Halticoptera sp. (Hym., Pteromalidae) und Achrysocharella sp. (Hym., Eulophidae). Die Gesamtparasitierungsrate reichte aus, um die Populationsgröße von L. trifolii unter der Schadensschwelle zu halten.

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